alexanderbrevig

Most recent activity

• LedMatrix for 8*8 WS2812

  in Projects • 8 years, 4 months

  

  For me, on windows, getting a custom firmware compiled can be done with these steps:

  1. Install VirtualBox
     
  2. Install Vagrant
     
  3. start cmd && cd /path/to/Espruino
     
  4. vagrant plugin install vagrant-auto_network
     
  5. vagrant up
     
  6. vagrant ssh
     
  7. do some changes
     
  8. ./scripts/create_espruino_image_1v3.sh
     
  9. flash it using the best tool for the local machine, I use ST-Link Utility and I flash from Windows
     
     

  Come to think of it, just follow this: https://github.com/espruino/Espruino/blo­b/master/README_Building.md#building-und­er-windowsmacos-with-a-vm-vagrant

  :)

• LoraWan modules for Espruino Pico

  in Interfacing • 8 years, 4 months

  

  Yes. It is in the description and the datasheet :)

• LoraWan modules for Espruino Pico

  in Interfacing • 8 years, 4 months

  

  Just to chime in; I think the first version could make a lot of sense, but maybe alight headers on 100mil grid? I would add male pins to 0-14 and a header to the other one. I could still plug it in a breadboard and use wires to power/serial.

  Did you do the math on those co-planar wave guides?
  If I were to consider something like this I would need to have a pi-filter in place for antenna matching. With good calculations you can get away with some standard LINX antenna and a 0ohm, but sooner or later someone will want to test various antennas and then it is very handy to be able to match the impedance of that particular one [you know this] :)

• How to use Espruino with WS2812 arrays? (Like RGB-123)

  in Interfacing • 8 years, 5 months

  

  Lodash is 14000+ LOC.
  Back when I helped fix Function.length it was actually because I wrote a few functional snippets for basic functional concepts. Sad thing is, it was on a disc that crashed... :/
  If you have access to "JavaScript: The Good Parts" by Douglas Crockford then that is a good resource for a collection of small snippets that enable functional concepts such as map, currying etc.

  Good luck @user59024

• programming some FPGA using Espruino/Pico

  in Interfacing • 8 years, 5 months

  

  Sounds very cool. Sounds like an even more adaptive Nios 2 softcore + compiler? Interesting stuff this is :)

• programming some FPGA using Espruino/Pico

  in Interfacing • 8 years, 5 months

  

  Oh man. I'm also interested in what you wanted to use this for :)

  I think the way to go would be to use the Espruino as a SPI interface to it's configuration memory. Have a look at the fpga-shield and the build log :)

  ---

  There are things like SystemC and other CtoHDL projects that I've found utter crap after trying anything but the samples they provide. They're fun and all, but even for an amateur like me, you quickly get to a blocking point.
  Did the project you worked on @Gordon compile C into opcodes for a soft core, or did you try to make a C to HDL thingy?

  I like how pshdl.org approaches things. I've not tried it yet.

  In the end, FPGAs are configured; not programmed.

• Espruino Web IDE button UI states flipped?

  @alexanderbrevig started

  • 5 comments
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  @Gordon replied
• Espruino Web IDE button UI states flipped?

  in General • 8 years, 5 months

  

  FWIW; every media player I've ever used (and the one I've made http://fidelify.net) shows the play button when in pause state, and pause button when in play state. Windows, Linux and Mac shows (with the icon) what will happen when you press the maximize/minimize button, not what state you're in.

  My 2 bits :)

• Any experience with PCA9501

  in Electronics • 8 years, 5 months

  

  Never seen anything like it, but it sure looks like a very handy part for many projects. I love the interrupt delegation and the small EEPROM.

  It seems to me that it should be relatively straight forward to use the I2C module with writeTo(address, data, ...) and readFrom(address, quantity). For the interrupt you can use setWatch(function, pin, options).

  EDIT: Gordon beat me to it :p I forgot to press Post after I was done typing... typical

• Espruino Web IDE button UI states flipped?

  in General • 8 years, 5 months

  

  Hi @Gordon!

  After some pondering I want to ask you if maybe some of the buttons in the IDE should be switched so they show what will happen, rather than what's happened?

  

  I think this is particularly true for the horizontal/vertical split. For the connect/disconnect, and the code/UI toggles per pane.

  Not sure what you intended but for me (it's always been like this I think) I need to press the 'disconnect' icon to connect. After a successful connection it turns to the green 'connected' icon, which I then press to disconnect. This feels backwards to me.

  What do you think?